You should be able to move your chain up and down about 20mm each way when you grip it midway between the chainring and the rear cog. Try pedalling the cranks round and pushing the chain off the chainring. If it comes off you obviously have it too loose. But on a single-speed slightly too loose is better than too tight.
Not sure what you're on about with this 'gap' though
You should be able to move your chain up and down about 20mm each way when you grip it midway between the chainring and the rear cog. Try pedalling the cranks round and pushing the chain off the chainring. If it comes off you obviously have it too loose. But on a single-speed slightly too loose is better than too tight.
Not sure what you're on about with this 'gap' though